Can't import template sliders - zip_open function is missing

The zip_open function is missing from your server. ZipArchive has to be enabled on your server to use this functionality! Ask your server host to enable it.

Solution:

The zip_open function is a core php function, so it should be enabled by default. You should do as the message says, contact your server host to enable it and enable the whole ZipArchive class.

Some servers have options on their cPanel dashboard to enable this, like GoDaddy, so if you google "ZipArchive" and your hosting company's name, you might be able to solve this issue yourself. Update for GoDaddy: You might also need to select the "PHP version" from the "Software" version, and then enable the "Zip" with its checkbox.